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Rails: create on has_one association
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edited May 9 '12 at 14:07
answered Oct 1 '10 at 13:59
se...
Validate uniqueness of multiple columns
...be patched?
– Alexey
Jul 16 '12 at 20:09
13
Alexey, validates_uniqueness_of [:user_id, :friend_id...
What is a PDB file?
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240
A PDB file contains information for the debugger to work with. There's less information in a Rel...
How to add multiple objects to ManyToMany relationship at once in Django ?
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edited Mar 27 '14 at 11:20
jnns
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answered Feb 10...
JavaScript checking for null vs. undefined and difference between == and ===
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+50
How do I check a variable if it's null or undefined...
Is the variable null:
if (a === null)
// or
if (a == null) // but see not...
Matplotlib Legends not working
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applicative_functorapplicative_functor
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Usage of sys.stdout.flush() method
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Haldean BrownHaldean Brown
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Is there a CSS selector by class prefix?
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edited Nov 19 '18 at 0:38
Daniel Compton
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an...
How do I use vimdiff to resolve a git merge conflict?
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edited Nov 5 '13 at 10:06
codebox
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answered ...
Linq to Entities join vs groupjoin
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380
Behaviour
Suppose you have two lists:
Id Value
1 A
2 B
3 C
Id ChildValue
1 a1
1 a2...